173 results about "Graphyne" patented technology

The invention discloses a graphdiyne multilayer composite membrane and a preparation method thereof, and belongs to the technical field of membrane separation. A porous base membrane with an alkynyl layer is obtained by adopting a two-step modification method, then the porous base membrane is soaked in a solution containing a graphdiyne monomer and a catalyst, and a reaction is performed at a certain temperature, so that a graphdiyne material fully grows on the surface of the porous base membrane. Adding a membrane casting solution formed by mixing an organic polymer, a cross-linking agent, a catalyst and an organic solvent to the surface of the graphdiyne-loaded porous base membrane, volatilizing the organic solvent, and curing at 80 DEG C to form the membrane. The ethanol permselective membrane has a three-layer membrane structure, namely the organic polymer layer, the ultrathin graphdiyne transition layer and the porous support layer, so that the problems of agglomeration and pore permeation of a nano material are effectively avoided, and the adsorption process of ethanol is further enhanced. The membrane prepared by the invention has higher pervaporation alcohol permeation performance, can efficiently and stably recover alcohols, and provides reference for the development of a novel pervaporation membrane structure with preferential alcohol permeation.

The invention discloses a method for preparing a graphdiynyl material based on a Sonogashira-Hagihara cross-coupling reaction, and belongs to the technical field of Sonogashira-Hagihara cross-coupling Reaction. According to the method, halogenated aromatic hydrocarbon and an alkynyl compound are used as raw materials, a palladium catalyst / copper catalyst is used as a catalytic system, and the graphdiynyl material is prepared by regulating the alkalinity and the polarity of a solvent. According to the present invention, the graphitized alkynyl material is obtained through the in-situ removal of the protection group on the acetylenic bond of the alkynyl compound and the Sonogashira-Hagihara cross coupling with the halogenated aromatic hydrocarbon, such that the method can select the variety of the halogenated aromatic hydrocarbon, the cost is low, the side reaction during the polymerization process is less, the variety of the graphitized alkynyl can be easily expanded, the development and the utilization of the high-quality graphitized alkynyl film can be easily achieved, and the method can be used for the preparation of the graphitized alkynyl material. The preparation cost of graphdiyne is reduced.

The invention discloses a preparation method and application of a polyamide composite nanofiltration membrane containing a graphdiyne middle layer, and belongs to the technical field of membrane separation. Comprising a porous substrate, a graphdiyne middle layer and a polyamide layer. The graphdiyne is selected from graphdiyne, graphdiyne, hydrogen-substituted graphdiyne and other graphdiyne derivatives. The specific preparation method comprises the following steps: carrying out suction filtration on graphdiyne dispersion liquid to a porous substrate, respectively dipping the graphdiyne dispersion liquid in a water phase and an oil phase, carrying out interfacial polymerization to generate a polyamide membrane, and finally, drying the membrane in a constant-temperature and constant-humidity drying oven to obtain the polyamide composite nanofiltration membrane containing the graphdiyne middle layer. The preparation method disclosed by the invention is simple and efficient, and the prepared composite membrane can effectively intercept divalent salt and organic matters in water and has excellent water permeability, ion separation and antibiotic desalination effects.

The invention discloses an actinide-graphdiyne aerogel composite material as well as a preparation method and application thereof, and belongs to the technical field of catalyst materials. The actinide-graphdiyne aerogel composite material comprises actinide ions, iodide ions and graphdiyne aerogel, the graphdiyne aerogel is of a porous net structure, and the actinide ions and the iodide ions exist on the surface of the graphdiyne aerogel in the form of nanoclusters; and the actinide ions are selected from one of Th, Pa, U, Np, Pu and Am ions. The actinide-graphdiyne aerogel composite material can be used as a catalyst to realize efficient thermocatalytic ammonia production under mild conditions, the thermocatalytic ammonia production performance of the composite material can be regulated and controlled by changing a monomer structure for preparing graphdiyne aerogel, and even thermocatalytic ammonia production of the graphdiyne aerogel material is realized under the condition of no metal load; the catalyst is expected to become a new-generation high-performance thermocatalytic ammonia production catalyst.

The invention relates to the technical field of heat-resistant materials, in particular to a heat-resistant polyethylene material and a preparation method thereof, and the heat-resistant polyethylene material comprises the following raw materials: ultra-high molecular weight polyethylene, zirconium oxide-zinc aluminate spinel (ZrO2-ZnAl2O4), modified graphdiyne, an antioxidant, a heat stabilizer, a plasticizer, a flame retardant and an anti-ultraviolet agent. The ultrahigh molecular weight polyethylene, the ZrO2-ZnAl2O4 and the modified graphdiyne play a role through a synergistic effect, a polyethylene molecular chain forms a firm three-dimensional network structure in a high-temperature radiation process, and a stable matrix supporting effect is provided; the excellent chemical stability and oxidation resistance of ZrO2-ZnAl2O4 in a high-temperature environment effectively inhibit the thermal degradation reaction of polyethylene, the service life of the material is prolonged, the modified graphdiyne is beneficial to rapid heat transmission, the thermal stability of the material is improved, meanwhile, the layered structure of the material has good lubricating performance, and the service life of the material is prolonged. The modified graphdiyne and the ZrO2-ZnAl2O4 are combined to avoid heat accumulation and material aging caused by the friction effect, and the ultrahigh molecular weight crosslinked polyethylene, the ZrO2-ZnAl2O4 and the modified graphdiyne form a multi-layer protection system to jointly improve the heat stability of the material.

The invention discloses a preparation method and application of chalcogenide doped graphdiyne, chalcogenide is implanted into a chalcogenide cavity in a simple thermal driving mode by using a chalcogenide cavity formed in para-nitrogen substituted graphdiyne as an anchoring site, so that the chalcogenide is distributed in a lattice shape, and a high-load monatomic graphdiyne material is obtained. The nano-enzyme sensor is constructed by utilizing the activity of peroxidase-like enhanced by the chalcogenide doped graphdiyne to detect bisphenol and thiosulfate ions, and powerful support is provided for monitoring of food safety and environmental safety.

The invention discloses a red phosphorus and graphdiyne composite material as well as a preparation method and application thereof, and belongs to the technical field of battery materials. The preparation method comprises the steps that the carbon paper and the red phosphorus are placed in a vacuum closed reactor to be subjected to heat treatment, in the heat treatment process, the red phosphorus is sublimated and desublimated, and desublimated red phosphorus nanoparticles cover the surface of the carbon paper; carrying out electrochemical deposition on the obtained carbon paper covered with red phosphorus on the surface, so that the surface of the carbon paper is covered with a copper simple substance as a catalyst for graphdiyne growth; and adding the obtained carbon paper into a hexaalkynyl benzene solution, reacting in a dark environment, and washing off unreacted copper elementary substance by using an acidic ferric salt mixed solution to obtain the red phosphorus and graphdiyne composite material. The obtained composite material has wide application prospects in lithium ion batteries and other ion battery negative electrode materials.

The invention belongs to the technical field of new energy batteries, and particularly relates to a fluorine-doped graphdiyne material and a preparation method and application thereof. The preparation method of the fluorine-doped graphdiyne material comprises the following steps: in a solvent system, mixing graphdiyne and a solid fluorine source, and drying to obtain a composite precursor; under the protective atmosphere, the composite precursor is annealed, so that the fluorine source is decomposed to release hydrogen fluoride and fluorine free radicals, the hydrogen fluoride or the fluorine free radicals are combined with carbon sites on graphdiyne through nucleophilic substitution, C-F bonds are formed, and the fluorine-doped graphdiyne material is obtained; the mass ratio of graphdiyne to the solid fluorine source is 30: (1-4). The fluorine-doped graphdiyne has the advantages that the defects are increased, the disorder is reduced, and the lithium storage capacity of the graphdiyne is improved, so that the long-term cycle performance and the high-rate performance are improved.

A process for the synthesis of a multilayer gamma-graphdiyne, which is a sp2 / sp1 allotrope of carbon having intrinsic semiconductor properties, by crystallization-assisted irreversible cross-coupling polymerization.

The invention discloses a hydrogen-fluorine atom doped graphdiyne material and a preparation method thereof, and relates to the technical field of carbon materials. According to the method, halogenated aromatic hydrocarbon and an alkynyl compound are taken as raw materials, a palladium catalyst and a copper catalyst are taken as a catalytic system, and an acetylenic bond of the alkynyl compound and the halogenated aromatic hydrocarbon are subjected to a Sonogashira coupling reaction to obtain the hydrogen-fluorine-doped graphite alkynyl material. The graphdiyne material provided by the invention has a large pore diameter, multiple active sites and high thermal stability and chemical stability, so that the hydrofluorine-doped graphdiyne material has excellent electrochemical energy storage property, shows reversible capacity of 1155mAh g <-1 > under 0.05 Ag <-1 > when being used as a negative electrode of a lithium ion battery, and can be used as a negative electrode of the lithium ion battery. And the density is almost 3 times that of a commercial graphite negative electrode material (300-350mAh g <-1 >). The application of the graphdiyne material in the field of electrochemical energy storage is obviously promoted.

The invention provides a silicon-carbon negative electrode material utilizing atomic layer deposition and a preparation method thereof, and the method adopts an atomic layer deposition method to deposit a silicon negative electrode active layer on a carbon carrier to prepare the silicon-carbon negative electrode material. The deposition temperature of the atomic layer deposition silicon negative electrode active layer is less than or equal to 400 DEG C. The carbon carrier is graphite, carbon black, activated carbon, mesoporous carbon, carbon nanotubes, graphene, graphdiyne or carbon aerogel. The precursor of the atomic layer deposition silicon negative electrode active layer is silane and halogenated silane. Silane and halogenated silane are used as precursors, atomic-scale precise construction of a silicon-carbon negative electrode is realized through an ALD process, and the silicon-carbon negative electrode material not only can effectively relieve volume expansion of the silicon negative electrode material, but also can shorten the transportation distance of lithium ions and improve the cycle performance of the battery.

A method includes synthesizing covalently bonded lattices based on irreversible bond-making reactions which favor exhaustive substitution on multi-functional substrates, wherein the irreversible bond-making reactions include ordered two-dimensional interfacial polymerizations of a monomer at a liquid / liquid interface, liquid-solid interface, or liquid-gas interface.

The invention relates to a host material for an electrode of a lithium-sulfur battery and a preparation method of the host material. According to the invention, a template is constructed by using a spray pyrolysis process, and the host material for the electrode of the lithium-sulfur battery is finally obtained, and is element-doped graphdiyne with a hollow multi-shell structure. The graphdiyne with a hollow multi-shell structure is doped by doping agents such as a boron source, a nitrogen source, a phosphorus source and a sulfur source, and due to introduction of doping elements, the graphdiyne material has high catalytic activity, can be used for catalyzing oxidation reduction of sulfur species, is beneficial to adsorption of polysulfide and limits the shuttle effect. Through the synergistic effect of the two, the performance of the lithium-sulfur battery can be further improved, and the comprehensive improvement of the energy density, the cycling stability and the rate capability of the lithium-sulfur battery is realized.

The invention relates to the technical field of materials, in particular to a graphdiynyl lanthanide series metal doped copper nano material and a preparation method and application thereof, and the preparation method comprises the following steps: preparing graphdiyne; in an inert gas atmosphere, graphdiyne, CuCl2. 5H2O, Dy (NO3) 3.5 H2O and ascorbic acid are subjected to a reaction in an aqueous solution, and the graphdiynyl lanthanide metal Dy doped copper nano material is obtained. Wherein the copper nano material is a cuprous oxide nano material. According to the prepared Dy-Cu2O / GDY, CO2 can be efficiently converted into C2H5OH through electrocatalytic reduction.

The invention provides a preparation method of a graphdiyne-loaded bimetallic nano material for VOCs adsorption. The preparation method comprises the following steps: S1, synthesizing a large-area and low-defect graphdiyne film by using an in-situ interface growth method; and S2, loading bimetallic nanoparticles on the surface of graphdiyne by adopting a co-impregnation-step reduction method. Meanwhile, the invention provides the graphdiyne-loaded bimetallic nano-material for VOCs adsorption, the graphdiyne-loaded bimetallic nano-material is prepared by adopting the preparation method, the graphdiyne-loaded bimetallic nano-material comprises Cu-Ag alloy nano-particles and Cu + active sites, Cu + accounts for 90% or above of the total copper content, and the nano-particles are anchored to the graphdiyne ring through a Cu-O-C equivalent key; in the aspects of stability and regeneration performance, after 20 times of adsorption-desorption cycle tests, the material capacity retention rate is gt; 90%.

The invention is applicable to the technical field of material preparation and electrochemical sensing, and discloses a graphdiyne oxide gold nanoparticle composite electrode, a preparation method and application of the graphdiyne oxide gold nanoparticle composite electrode in a non-enzymatic glucose electrochemical sensor. Preparing the prepared graphdiyne oxide into an aqueous dispersion, taking carbon cloth as a substrate electrode, soaking the carbon cloth in the graphdiyne oxide dispersion after ethanol soaking, drying and surface treatment, drying, then soaking the carbon cloth in the prepared gold nanoparticle solution, and heating and drying to obtain the graphdiyne oxide gold nanoparticle composite electrode; the graphdiyne oxide and the gold nanoparticles are uniformly distributed on the surface of the carbon cloth. Due to the fact that rich oxygen-containing groups on the graphdiyne oxide can cooperate with the gold nanoparticles to promote catalytic oxidation of glucose, the non-enzymatic glucose electrochemical sensor prepared based on the electrode material has high catalytic activity on glucose and shows high sensitivity, selectivity and stability.

The invention provides a quantum dot catalyst as well as a preparation method and application thereof, the quantum dot catalyst comprises a graphdiyne matrix and metal quantum dots coating the outer surface of the graphdiyne matrix, and the metal quantum dots are connected with the graphdiyne matrix in a chemical bond form; wherein metal in the metal quantum dots is Au-Cu alloy. The quantum dot catalyst prepared by adopting the preparation method disclosed by the invention has a relatively high specific surface area, catalytic active sites are increased, relatively high catalytic activity is shown in an application process, and the comprehensive performance is relatively excellent.

The present invention provides a method for preparing an adsorbent material for treating arsenic-containing wastewater, comprising the following steps performed in sequence: step [1] forming an NH(CH2COO)2Fe(COC2H5) organic compound layer on the surface of a sponge iron substrate; step [2] introducing an octylphenol polyoxyethylene ether composite group on the surface of graphyne to perform surface modification to obtain modified graphyne; step [3] loading the obtained modified graphyne on the NH(CH2COO)2Fe(COC2H5) organic compound layer to obtain the adsorbent material. The adsorbent material prepared by the method of the present invention has excellent soluble arsenic adsorption and removal performance, wide pH range and adaptability to soluble arsenide concentration range and other properties.

The invention belongs to the technical field of nano materials, and particularly relates to a nitrogen doping method and application of gamma-graphdiyne. Graphdiyne oxide is prepared through a hydrothermal method, then melamine serves as a nitrogen source, graphdiyne oxide serves as a framework, in-situ doping of nitrogen elements and reduction of graphdiyne oxide are achieved at the same time through high-temperature calcination, and the gamma-graphdiyne is obtained. The method is simple and easy to implement, the processing period is short, the doping amount is easy to control, dangerous chemicals such as concentrated sulfuric acid and concentrated nitric acid are not involved, the production safety is greatly improved, and the prepared nitrogen-doped gamma-graphdiyne has the advantages of high purity, high specific surface area, nanoscale pore diameter and excellent wave absorbing performance, gas sensitivity and ferromagnetism.

The application discloses a kind of graphdiyne multilayer composite membrane and preparation method thereof, belong to membrane separation and technical field.Porous base membrane with acetylenic group layer is obtained by two-step modification method, then it is immersed in solution containing graphdiyne monomer and catalyst, and reaction is carried out at a certain temperature, so that graphdiyne material is fully grown on the surface of porous base membrane.Then casting solution of organic polymer, crosslinking agent, catalyst and organic solvent is added to the surface of porous base membrane loaded with graphdiyne, and after the organic solvent is volatilized, it is cured into film at 80 DEG C.The preferential alcohol permeation membrane of the application has a three-layer film structure: organic polymer layer, ultrathin graphdiyne transition layer and porous support layer, effectively avoiding the agglomeration and pore penetration problem of nanomaterial, further strengthening the adsorption process of ethanol.The prepared membrane has high pervaporation alcohol permeation performance, can efficiently and stably recover alcohol, and provides a reference for the development of novel preferential alcohol pervaporation membrane structure.

The present invention relates to a catalyst for treating carbon-containing tail gas and a preparation process thereof, and belongs to the technical field of catalysts. The present invention uses boron and nitrogen elements to dope and modify a mixture of gyrene and graphene. The doping of boron and nitrogen can change the electronic structure of graphene and graphene, thereby introducing new active sites on the catalyst surface and improving the catalytic activity of the catalyst. The d orbit of the boron atom can also form a specific chemical bond with the π orbit of graphene and graphene, thereby breaking the symmetry of graphene and graphene and improving the electrical conductivity. The improvement of electrical conductivity can promote the transmission and transfer of electrons on the catalyst surface, which helps to accelerate the electron transfer process in the carbon removal reaction and improve the catalytic efficiency. The present invention first performs a primary calcination of the iron manganese ore and nickel nitrate mixture at 500°C under a nitrogen atmosphere, and then mixes the modified gyrene and graphene doped with boron and nitrogen elements and performs a secondary calcination at 400°C, so that a more stable composite catalyst can be formed between the substances.

A hydrogen gas storage tank includes a body including a metallic bulk region and one or more protective layers adjacent to the bulk region. One or more of these protective layers comprise a number of graphyne molecules such that the one or more protective layers are configured to lower hydrogen adsorption into the bulk region when compared to a bulk region with protective layers free from graphyne.

The present application provides a method for preparing and using a graphene / poly N,N-diethylacrylamide hydrogel film electrode. The graphene / poly N,N-diethylacrylamide hydrogel film electrode is prepared by the preparation method provided by the present application. Phenylhydrazine is used as an active probe of environmental pollution molecules. The graphene / poly N,N-diethylacrylamide hydrogel film electrode exhibits pH, temperature, and salt-sensitive electrochemical responses and exhibits switch properties. Furthermore, the graphene / poly N,N-diethylacrylamide hydrogel film electrode is combined with phenylhydrazine molecular electrocatalysis, and the electrochemical catalytic oxidation of phenylhydrazine is controlled and regulated by utilizing the changes in various stimulating factors of the external environment, thereby realizing the monitoring and control of phenylhydrazine and the construction of a logic gate system.

The present invention discloses a method for preparing a patterned graphene film, comprising: method 1: first preparing a patterned inorganic layer on a copper plate substrate, exposing the area where the graphene film is needed, covering the area where the graphene film is not needed with the inorganic layer, and growing the graphene film in the area not covered by the inorganic layer; depositing or coating other substrates on the obtained graphene layer; using a chemical solution to dissolve the copper plate substrate, thereby transferring the patterned graphene layer to other substrates; or method 2: first preparing a patterned copper layer on any substrate, and growing the graphene film only in the area with the copper layer. The present invention uses the copper layer as a catalyst for growing the graphene film, directly patterns the copper layer through a yellow light process, or covers the surface with a patterned inorganic layer, so that the grown graphene film itself is patterned, and the operation is simple and easy to implement.

The invention discloses a lining water seepage prevention structure and a construction technology thereof. The structure comprises a substrate layer made of sugarcane fibers and Portland cement, and the substrate layer effectively resists cracking and dry shrinkage; the anti-seepage layer is compounded by nano graphdiyne and a calcium sulphoaluminate-calcium oxide expanding agent, so that super-strong anti-seepage and crack self-repairing are realized; the sealing layer is composed of butyl rubber and zinc citrate, joints are efficiently sealed, and calcium carbonate crystallization is inhibited. The construction technology comprises the steps of laying of the permeable geotextile, layered pouring, joint strengthening of the pre-compressed sugarcane fiber strips and triple curing. The concrete has the advantages of being high in impermeability, excellent in self-repairing performance, good in crack resistance, durable in seam sealing, environmentally friendly and the like, and is suitable for water conservancy projects such as channels.

The application belongs to the technical field of biological medical materials, and discloses a polydopamine modified modified nano-graphyne and a preparation method and application thereof. In the method, the polydopamine coating is combined with the nano-graphyne for the first time to construct a GDY@PDA composite system, and the core defects of the blocky graphyne, such as easy agglomeration, poor water solubility and insufficient biocompatibility, are solved. The graphyne-based material is applied to the near-infrared two-region photothermal regulation of neural cell calcium influx for the first time, the calcium ion channel is activated through the local thermal effect of the material, and precise, remote and reversible calcium influx regulation is realized; the limitation that the traditional biocompatibility modification is easy to fall off and difficult to functionalize is broken through, the polydopamine modification makes the material have both photothermal efficiency and biological safety, and the application of the graphyne in the treatment of neural diseases (such as neural cell injury repair) is expanded.

The present invention provides a tubular Graphyne coated bismuth particle nanomaterial and its preparation method and application. The preparation method of the material comprises the following steps: using a copper catalyst to catalyze a precursor to perform an acetylene-acetylene coupling reaction to prepare a Graphyne coated copper nanomaterial; using an electrochemical replacement reaction to replace the metal copper in the Graphyne coated copper nanowire with metal bismuth to obtain the material. The material can effectively solve the problem that the existing bismuth material has a large volume change during the charge and discharge process, resulting in rapid performance degradation.

The invention provides an amidoxime group modified graphdiyne material and a preparation method thereof. The preparation method comprises the following steps: (1) preparing graphdiyne through in-situ growth on a template; (2) carrying out cyanation modification on the graphdiyne; and (3) carrying out amidoximation reaction on the graphdiyne subjected to cyanation modification. Before amidoximation reaction, the cyan-modified graphdiyne-template composite material can be selectively dispersed in an oxidizing agent, the template is removed through etching of the oxidizing agent, and then the amidoxime-modified graphdiyne material is prepared. According to the invention, terminal alkyne dispersed by graphdiyne is utilized, and amidoxime groups are grafted through chemical modification, so that the introduced groups are far away from one another and are distributed in a free state. The prepared amidoxime group modified graphdiyne material has excellent selectivity on uranium element, and can be used for high-selectivity seawater uranium extraction and efficient separation of uranium and vanadium elements.

The application discloses a kind of spin latches based on ultrafast magneto-optical dynamics, construction method and system, belong to spin dynamics technical field, the basic function of RS latch is realized by the angle of Co4&gamma-Graphyne system spin state control, successfully designed with RS latch as the foundation spin latch latch, the logic unit consumed is less, compared with the traditional latch, avoid the influence of glitch, and the entire completion time reaches ultra-high speed sub-picosecond, guarantee degree is more than 95%.This provides a train of thought for the design and application of new generation spin latch.

The present application relates to the field of fuel cell technology, and discloses an oxygen reduction reaction catalyst and its preparation method and application, including the following steps: adding graphyne powder to water, ultrasonically dispersing until the graphyne powder is completely and evenly dispersed in the water to obtain a graphyne solution; mixing the graphyne solution with a chloroplatinic acid solution, adding a dilute formic acid solution under stirring, and reacting under stirring; filtering, washing the solid phase, and drying to obtain the oxygen reduction reaction catalyst. The present application prepares the oxygen reduction reaction catalyst by adopting an optimized liquid phase reduction method, and the steps are simple, and the platinum nanoparticles of the prepared oxygen reduction reaction catalyst grow uniformly in size and uniformly distributed on the surface of graphyne, and have excellent ORR activity and stability, and have performance superior to commercial catalysts.